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/* Copyright (C) 1990, 2000 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: zbseq.c,v 1.6 2002/02/21 22:24:54 giles Exp $ */
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/* Level 2 binary object sequence operators */
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#include "memory_.h"
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#include "ghost.h"
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#include "gxalloc.h" /* for names_array in allocator */
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#include "oper.h"
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#include "ialloc.h"
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#include "istruct.h"
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#include "btoken.h"
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#include "store.h"
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/*
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* Define the structure that holds the t_*array ref for the system or
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* user name table.
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*/
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typedef struct names_array_ref_s {
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ref names;
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} names_array_ref_t;
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gs_private_st_ref_struct(st_names_array_ref, names_array_ref_t,
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"names_array_ref_t");
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/* Create a system or user name table (in the stable memory of mem). */
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int
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create_names_array(ref **ppnames, gs_memory_t *mem, client_name_t cname)
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{
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ref *pnames = (ref *)
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gs_alloc_struct(gs_memory_stable(mem), names_array_ref_t,
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&st_names_array_ref, cname);
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if (pnames == 0)
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return_error(e_VMerror);
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make_empty_array(pnames, a_readonly);
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*ppnames = pnames;
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return 0;
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}
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/* Initialize the binary token machinery. */
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private int
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zbseq_init(i_ctx_t *i_ctx_p)
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{
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/* Initialize a fake system name table. */
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/* PostScript code will install the real system name table. */
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ref *psystem_names = 0;
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int code = create_names_array(&psystem_names, imemory_global,
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"zbseq_init(system_names)");
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if (code < 0)
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return code;
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system_names_p = psystem_names;
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return 0;
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}
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/* <names> .installsystemnames - */
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private int
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zinstallsystemnames(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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if (r_space(op) != avm_global || imemory_save_level(iimemory_global) != 0)
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return_error(e_invalidaccess);
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check_read_type(*op, t_shortarray);
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ref_assign_old(NULL, system_names_p, op, ".installsystemnames");
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pop(1);
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return 0;
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}
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/* - currentobjectformat <int> */
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private int
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zcurrentobjectformat(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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push(1);
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*op = ref_binary_object_format;
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return 0;
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}
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/* <int> setobjectformat - */
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private int
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zsetobjectformat(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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ref cont;
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check_type(*op, t_integer);
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if (op->value.intval < 0 || op->value.intval > 4)
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return_error(e_rangecheck);
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make_struct(&cont, avm_local, ref_binary_object_format_container);
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ref_assign_old(&cont, &ref_binary_object_format, op, "setobjectformat");
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pop(1);
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return 0;
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}
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/* <ref_offset> <char_offset> <obj> <string8> .bosobject */
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/* <ref_offset'> <char_offset'> <string8> */
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/*
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* This converts a single object to its binary object sequence
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* representation, doing the dirty work of printobject and writeobject.
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* (The main control is in PostScript code, so that we don't have to worry
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* about interrupts or callouts in the middle of writing the various data
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* items.) Note that this may or may not modify the 'unused' field.
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*/
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private int
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zbosobject(i_ctx_t *i_ctx_p)
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{
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os_ptr op = osp;
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int code;
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check_type(op[-3], t_integer);
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check_type(op[-2], t_integer);
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check_write_type(*op, t_string);
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if (r_size(op) < 8)
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return_error(e_rangecheck);
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code = encode_binary_token(i_ctx_p, op - 1, &op[-3].value.intval,
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&op[-2].value.intval, op->value.bytes);
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if (code < 0)
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return code;
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op[-1] = *op;
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r_set_size(op - 1, 8);
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pop(1);
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return 0;
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}
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/* ------ Initialization procedure ------ */
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const op_def zbseq_l2_op_defs[] =
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{
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op_def_begin_level2(),
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{"1.installsystemnames", zinstallsystemnames},
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{"0currentobjectformat", zcurrentobjectformat},
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{"1setobjectformat", zsetobjectformat},
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{"4.bosobject", zbosobject},
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op_def_end(zbseq_init)
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};
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